Fix API compatibility and add user/role/permission and asset import/export

backend_new/.gitignore

@@ -0,0 +1,94 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+.hypothesis/
+.pytest_cache/
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+logs/
+*.log
+
+# Database
+*.db
+*.sqlite3
+
+# Uploads
+uploads/*
+!uploads/.gitkeep
+
+# Alembic
+alembic/versions/*.py
+!alembic/versions/__init__.py
+
+# MyPy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre
+.pyre/
+
+# Jupyter
+.ipynb_checkpoints
+
+# PyCharm
+.idea/
+
+# VSCode
+.vscode/